Ok, so I've been trying to write this article for a while and I've been having issues with nailing down which direction I want to go in. The basic idea is that this middle aged man is a shapeshifter who can only change into what a nearby child wants in a friend/companion (though still human). A further limitation is that he has to change back to 'himself' between other changes.

In version one, the Foundation recovers him with little issue. He's compliant and generally ok with being contained. During testing they push the boundaries of what constitutes a child. A breakthrough is reached when they discover he can change into what the target wants in a romantic companion. At this point he refuses to cooperate further and I was thinking of having him escape through luck or something. Basically for this version I was thinking of a guy who doesn't mind being contained too much but feels he has to take a stand for his morals (whether or not it's warranted)

In version two, the Foundation recovers him after a child is killed. He varies between being non-compliant and outright aggressive with staff. In this version it would be implied throughout that he both raped and killed the child. However, at the end, it would be revealed that there was a third person who did it and the SCP inadvertently killed him. For this version, I was thinking of a guy who blames himself for the death of the child and so allows everyone to believe that he did it directly.

I'm wondering if the basic idea has been done before, if this is different enough to stand on its own and which of the two ideas would be better for me to pursue. Also, if this is complete rubbish, let me know.

I'm not too sure if this particular idea has been done before, but I'm fairly certain theres a shapeshifter somewhere in the SCP site. I really like both ideas, however, version two seems more intriguing. I do like the fact that he attempts escape though, but perhaps he changed into one of the researchers or staff?
Then again, just throwing stuff out there. Take this with a grain of salt, I'm fairly new to the site.

In this version it would be implied throughout that he both raped and killed the child. However, at the end, it would be revealed that there was a third person who did it and the SCP inadvertently killed him. For this version, I was thinking of a guy who blames himself for the death of the child and so allows everyone to believe that he did it directly.

you never say that there isn't any rape even after the implying, and thats in very bad taste on
this site.

scratch that, anything involving rape is very distasteful. This is why I down voted 231. It isn't rape, but its heavily implied.